Structural Columns 8″ Straight, 8″ & 10″ Tapered, 8″ Fluted, 8″ Square x 9′ white ivory clay 8″ Tapered or Straight Round Column (7 3/4″ tapers to 6 1/8″) 8″ Square x 9′ 10″ Tapered Round Column (9 3/4″ tapers to 8 1/8″) Available in white (ivory and clay in 120″ long only). Plain structural round 108″ and 120″ long columns featured a unique plate system with hardware included. Fluted posts available in custom lengths up to 120″. Posts do not have seam lines. Structural post load: Maximum 18,000 lbs. Uplift approx. 1,600 lbs. maximum Round Column Aluminum Top & Bottom Round Column Plates Top & Bottom Round Column Trim Square Column Aluminum Top & Bottom Square Column Plates Square Column Trim Set sold separately.